package com.example.mybatis.handler;

import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.StringTypeHandler;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class MyStringTypeHandler extends StringTypeHandler {
    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType) throws SQLException {
        ps.setString(i, parameter);
    }

    @Override
    public String getNullableResult(ResultSet rs, String columnName) throws SQLException {
        return rs.getString(columnName);
    }

    @Override
    public String getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return rs.getString(columnIndex);
    }

    @Override
    public String getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return cs.getString(columnIndex);
    }

    @Override
    public String getResult(ResultSet rs, String columnName) throws SQLException {
        String result = super.getResult(rs, columnName);
        if (result == null) {
            return "姓名为空";
        }
        return result;
    }
}
